CN101319955A - Method for extracting leakage of pipe monitored by infrasonic wave - Google Patents
Method for extracting leakage of pipe monitored by infrasonic wave Download PDFInfo
- Publication number
- CN101319955A CN101319955A CNA2007101105833A CN200710110583A CN101319955A CN 101319955 A CN101319955 A CN 101319955A CN A2007101105833 A CNA2007101105833 A CN A2007101105833A CN 200710110583 A CN200710110583 A CN 200710110583A CN 101319955 A CN101319955 A CN 101319955A
- Authority
- CN
- China
- Prior art keywords
- wave
- leakage
- pipeline
- infrasonic
- pressure
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
Landscapes
- Examining Or Testing Airtightness (AREA)
Abstract
The invention provides a principle and method for adopting the existing instrument of a pipeline to extract a sound wave for monitoring the leakage of the pipeline for solving the defect of the existing information obtaining technology by adopting an infrasonic wave to monitor the leakage information of the pipeline. When the method is adopted to monitor a certain section of pipeline, a sensor is not needed to be arranged on the pipeline, a pressure and a flux signal are collected directly by a pressure transducer and a flowmeter and then an infrasonic wave signal is separated and screened from the pressure and the flux signal. Explaining by combining with an attached drawing, the method includes the steps of firstly collecting data and storing the pressure and the flux signal comprising various frequencies into a database1; then carrying out frequency spectrum analyzing 2, sorting the infrasonic wave signal selected by analyzing, extracting the characteristic of the infrasonic wave signal and then storing the infrasonic wave signal into the database 3 for 4 outputting to a next flow for analyzing the leakage.
Description
Affiliated technical field:
The present invention relates to a kind of line leakage method, especially utilize infrasonic wave to carry out the method for line leakage.
Background technology:
At present, known sound wave monitoring is used for various line leakage methods, pipe leakage early warning and the leakage monitoring two kinds of technology of reporting to the police are arranged.The technology of pipe leakage early warning: have Israel HADAS company to be used for the outside sound wave early warning technology that the seismic event wave detector is installed of pipeline; The high sensor that more domestic producers install on pipeline external wall is gathered the technology of acoustic signals monitoring pipeline in real time.In the leakage monitoring alarm method: No. 200520025297.3 utility application of China are arranged, and this application adopts dynamic pressure type waveguide type sonic sensor monitoring pipeline; Can set sound wave line leakage instrument---the electroacoustics transducer of range in addition according to the conveyance conduit dynamic change, cause the infrasonic wave that medium moment physical perturbation produces owing to leaking in the receiving pipeline operational process.
This technology of two types all has needs to adorn the characteristics of sonic sensor in addition, be subjected to the constraint of the physical characteristics of sound wave own, these sensors or be that frequency band is narrow, adaptive surface is little, be that each sensor distance is little, need a plurality of sensors be installed on pipeline, therefore, the technology range of application that adopts these two kinds of ways to obtain pipe leakage information is restricted.
Summary of the invention:
In order to overcome the deficiency of existing infrasonic wave technology for information acquisition, the present invention proposes and adopt the existing instrument of pipeline to extract the principle and the method for leakage of pipe monitored by infrasonic wave, and illustrated that utilizing pressure, flow instrument image data to extract infrasonic wave is the best way.This method is implemented easily, and the sensitivity that can improve leakage monitoring reduces false alarm, improves bearing accuracy.
The technology path that the present invention deals with problems is: directly gather the flow pressure data in the pipe conveying procedure, adopt these data of software processes, extract infrasonic wave wherein, be used to monitor pipe leakage.
When fluid was carried in pipeline, no matter liquid or gas, itself also was the sonic propagation medium as the sound source body time.Influenced by various factors, in the time of between particle and loosen, the time and closely, thereby produce pressure suddenly little, neglect the big pressure wave that changes, just sound wave; In case pipeline leaks, leakage point also can produce sound wave; These two kinds of fluctuations have all caused the variation of flow, and this can see too clearly on P-T and Q-T curve, the basis of Here it is analysis conduit running status and leakage.Test after testing, by means of spectrum analysis, we can see, these are almost contained full wave sound wave and all can propagate in medium, and still, short ultrasound wave and the audible sound wave of wavelength ratio just absorbed by medium gradually and disappeared in the not far position of distance sound source, and wavelength is short more, attenuation by absorption also fast more, the distance of having only infrasonic wave to propagate is far away, can pass to beyond a few km to tens ten thousand kms.Infrasonic velocity of propagation and heard sound phase of wave are same, though it can not cause people hearing organ's sensation, it leaks our analysis conduit has the using value that can not be substituted.Can produce the sound wave of each frequency range behind the pipe leakage, if want only along journey a lot of sensors to be housed at pipeline by audible sound wave and monitoring ultrasonic pipe leakage, obviously be irrational and do like this.In a single day pipeline leaks, have only left unabsorbed infrasonic wave signal can pass to the sensor of far-end in the leakage point sound source.As long as leakage point is not to appear near the sensor, sensor also just can only detect the infrasonic wave part that leakage produces.
So the remote monitoring pipe leakage has only the infrasonic wave of analysis just valuable.In order to obtain pipe leakage information, just right sensors must be arranged by infrasonic wave.Studies show that for the pipeline of a working pressure district much larger than its surge pressure, monitoring audible sound wave and ultrasound wave can adopt sonic transducer, but the monitoring infrasonic wave just dying.Because it all is the composite wave of multiple spectra that pipeline takes place to leak the infrasonic wave that produces, very complicated, frequency domain and amplitude change difference very greatly, the monitoring pipe leakage is the distortionless variation that monitors any fluid state to the requirement of information, require the Hz-KHz of sensor enough wide, general capacitance pressure transmitter frequency respective area 0～10Hz adopts the pressure unit of diffuse si sensor manufacturing can reach 0～1000Hz; On Strength Changes, the interval that changes reaches several handkerchiefs～tens of MPas, using an infrasonic sensor to detect so the data of wide variation does not accomplish, yet, the reasonable workspace of pressure unit just, the interval of Bian Huaing like this, so pressure unit is the best sensor of remote monitoring pipe leakage.
What the present invention dealt with problems technical scheme is: adopt a certain segment pipe of monitored by infrasonic wave to leak, needn't on pipeline, adorn sonic transducer, directly gather pressure, flow signal, adopt the way of software to extract needed infrasonic wave then and get final product by pressure unit and flowmeter.
Description of drawings:
Accompanying drawing is a content schematic diagram of the present invention.At first be image data, deposit these pressure, flow signals that contain various frequencies in database 1; Carry out spectrum analysis 2 then; The infrasonic wave signal that analysis is selected is classified; Extract its feature, the database 3 of restoring; Export to next process analysis with 4 and leak use.Because sound wave in transmission course along transmission path exponentially rule decay, the high more decay of frequency fast more.Leakage signal is propagated to both sides in the pipeline inner fluid simultaneously, according to these characteristics, we can judge the position that signal source takes place from the frequency and the intensity two aspect numerical value change of signal, with the information of these different characteristics as neuronic input signal, through handling, just can in time find pipe leakage, the location of accurately reporting to the police, accomplishing does not have false alarm.
By an embodiment of certain line leakage, we see that this method is very effective, have reached the monitoring sensitivity height, do not have the target of false alarm, prove that the present invention is successful.
Claims (1)
- In order to overcome the deficiency of existing infrasonic wave technology for information acquisition, the present invention proposes and adopt the existing instrument of pipeline to extract the principle and the method for leakage of pipe monitored by infrasonic wave, and illustrated that utilizing pressure, flow instrument image data to extract infrasonic wave is the best way.This method is implemented easily, and the sensitivity that can improve leakage monitoring reduces false alarm, improves bearing accuracy; The technology path that the present invention deals with problems is, directly gathers the flow pressure data in the pipe conveying procedure, adopts these data of software processes, extracts infrasonic wave wherein, is used to monitor pipe leakage; When fluid was carried in pipeline, no matter liquid or gas, itself also was the sonic propagation medium as the sound source body time.Influenced by various factors, in the time of between particle and loosen, the time and closely, thereby produce pressure suddenly little, neglect the big pressure wave that changes, just sound wave; In case pipeline leaks, leakage point also can produce sound wave; These two kinds of fluctuations have all caused the variation of flow, and this can see too clearly on P-T and Q-T curve, the basis of Here it is analysis conduit running status and leakage.Test after testing, by means of spectrum analysis, we can see, these are almost contained full wave sound wave and all can propagate in medium, and still, short ultrasound wave and the audible sound wave of wavelength ratio just absorbed by medium gradually and disappeared in the not far position of distance sound source, and wavelength is short more, attenuation by absorption also fast more, the distance of having only infrasonic wave to propagate is far away, can pass to beyond a few km to tens ten thousand kms.Infrasonic velocity of propagation and heard sound phase of wave are same, though it can not cause people hearing organ's sensation, it leaks our analysis conduit has the using value that can not be substituted.Can produce the sound wave of each frequency range behind the pipe leakage, if want only along journey a lot of sensors to be housed at pipeline by audible sound wave and monitoring ultrasonic pipe leakage, obviously be irrational and do like this.In a single day pipeline leaks, have only left unabsorbed infrasonic wave signal can pass to the sensor of far-end in the leakage point sound source.As long as leakage point is not to appear near the sensor, sensor also just can only detect the infrasonic wave part that leakage produces; So the remote monitoring pipe leakage has only the infrasonic wave of analysis just valuable.In order to obtain pipe leakage information, just right sensors must be arranged by infrasonic wave.Studies show that for the pipeline of a working pressure district much larger than its surge pressure, monitoring audible sound wave and ultrasound wave can adopt sonic transducer, but the monitoring infrasonic wave just dying.Because it all is the composite wave of multiple spectra that pipeline takes place to leak the infrasonic wave that produces, very complicated, frequency domain and amplitude change difference very greatly, the monitoring pipe leakage is the distortionless variation that monitors any fluid state to the requirement of information, require the Hz-KHz of sensor enough wide, general capacitance pressure transmitter frequency respective area 0～10Hz adopts the pressure unit of diffuse si sensor manufacturing can reach 0～1000Hz; On Strength Changes, the interval that changes reaches several handkerchiefs～tens of MPas, using an infrasonic sensor to detect so the data of wide variation does not accomplish, yet, the reasonable workspace of pressure unit just, the interval of Bian Huaing like this, so pressure unit is the best sensor of remote monitoring pipe leakage; What the present invention dealt with problems technical scheme is: adopt a certain segment pipe of monitored by infrasonic wave to leak, needn't on pipeline, adorn sonic transducer, directly gather pressure, flow signal, adopt the way of software to extract needed infrasonic wave then and get final product by pressure unit and flowmeter.Accompanying drawings the present invention now.At first be image data, deposit these pressure, flow signals that contain various frequencies in database 1.Carry out spectrum analysis 2 then, with the infrasonic wave signal classification that analysis is selected, extract its feature, the database 3 of restoring is exported to next process analysis with 4 and is leaked use.Because sound wave in transmission course along transmission path exponentially rule decay, the high more decay of frequency fast more.Leakage signal is propagated to both sides in the pipeline inner fluid simultaneously, according to these characteristics, we can judge the position that signal source takes place from the frequency and the intensity two aspect numerical value change of signal, with the information of these different characteristics as neuronic input signal, through handling, just can in time find pipe leakage, the location of accurately reporting to the police, accomplishing does not have false alarm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNA2007101105833A CN101319955A (en) | 2007-06-07 | 2007-06-07 | Method for extracting leakage of pipe monitored by infrasonic wave |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNA2007101105833A CN101319955A (en) | 2007-06-07 | 2007-06-07 | Method for extracting leakage of pipe monitored by infrasonic wave |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN101319955A true CN101319955A (en) | 2008-12-10 |
Family
ID=40180129
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNA2007101105833A Pending CN101319955A (en) | 2007-06-07 | 2007-06-07 | Method for extracting leakage of pipe monitored by infrasonic wave |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN101319955A (en) |
Cited By (13)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101871807A (en) * | 2010-04-16 | 2010-10-27 | 华南师范大学 | Infrasonic wave detection device and method |
| CN103629534A (en) * | 2013-11-25 | 2014-03-12 | 孙良 | Oil pipeline leakage detection and positioning method based on comprehensive signals |
| CN103858005A (en) * | 2011-10-06 | 2014-06-11 | 韦斯全球有限公司 | Ultrasound system for measuring both flow rate and density using |
| CN106678552A (en) * | 2017-01-05 | 2017-05-17 | 北京埃德尔黛威新技术有限公司 | Novel leakage early warning method |
| CN106764468A (en) * | 2017-01-05 | 2017-05-31 | 北京埃德尔黛威新技术有限公司 | A kind of seepage early warning system and adaptive spectrum noise-eliminating method |
| CN107421596A (en) * | 2017-06-12 | 2017-12-01 | 贵州联智讯科技有限公司 | A kind of water supply network method that actively report leaks and its report leakage system |
| WO2019019709A1 (en) * | 2017-07-24 | 2019-01-31 | 厦门快商通科技股份有限公司 | Method for detecting water leakage of tap water pipe |
| CN109357167A (en) * | 2018-10-30 | 2019-02-19 | 长春市万易科技有限公司 | A kind of gas pipeline device for detecting leak point and detection method |
| CN109595472A (en) * | 2018-11-29 | 2019-04-09 | 北京市燃气集团有限责任公司 | The pipeline abnormal flow recognition methods of mesolow garden and device based on spectrum analysis |
| CN110145694A (en) * | 2019-07-02 | 2019-08-20 | 北京中计新业科技发展有限公司 | A kind of gas distributing system leakage monitoring system and detection method |
| CN110234375A (en) * | 2017-02-01 | 2019-09-13 | 拜耳医药保健有限公司 | The choacoustic frequency of Patient line identifies |
| CN111351618A (en) * | 2018-12-21 | 2020-06-30 | 北京新联铁集团股份有限公司 | Air tightness detection method and system for rail transit rolling stock |
| CN112923245A (en) * | 2021-02-03 | 2021-06-08 | 宁波水表(集团)股份有限公司 | Method for detecting leakage of water supply pipe network |
-
2007
- 2007-06-07 CN CNA2007101105833A patent/CN101319955A/en active Pending
Cited By (19)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101871807B (en) * | 2010-04-16 | 2012-01-04 | 华南师范大学 | Infrasonic wave detection device and method |
| CN101871807A (en) * | 2010-04-16 | 2010-10-27 | 华南师范大学 | Infrasonic wave detection device and method |
| CN103858005A (en) * | 2011-10-06 | 2014-06-11 | 韦斯全球有限公司 | Ultrasound system for measuring both flow rate and density using |
| CN103858005B (en) * | 2011-10-06 | 2016-08-17 | 韦斯全球有限公司 | Ultrasonic flow and concentration share measurement system |
| CN103629534A (en) * | 2013-11-25 | 2014-03-12 | 孙良 | Oil pipeline leakage detection and positioning method based on comprehensive signals |
| CN103629534B (en) * | 2013-11-25 | 2017-01-11 | 中国石油大学(华东) | Oil pipeline leakage detection and positioning method based on comprehensive signals |
| CN106678552A (en) * | 2017-01-05 | 2017-05-17 | 北京埃德尔黛威新技术有限公司 | Novel leakage early warning method |
| CN106764468A (en) * | 2017-01-05 | 2017-05-31 | 北京埃德尔黛威新技术有限公司 | A kind of seepage early warning system and adaptive spectrum noise-eliminating method |
| CN110234375A (en) * | 2017-02-01 | 2019-09-13 | 拜耳医药保健有限公司 | The choacoustic frequency of Patient line identifies |
| CN110234375B (en) * | 2017-02-01 | 2021-11-23 | 拜耳医药保健有限公司 | Acoustic frequency identification of patient lines |
| CN107421596A (en) * | 2017-06-12 | 2017-12-01 | 贵州联智讯科技有限公司 | A kind of water supply network method that actively report leaks and its report leakage system |
| WO2019019709A1 (en) * | 2017-07-24 | 2019-01-31 | 厦门快商通科技股份有限公司 | Method for detecting water leakage of tap water pipe |
| CN109357167A (en) * | 2018-10-30 | 2019-02-19 | 长春市万易科技有限公司 | A kind of gas pipeline device for detecting leak point and detection method |
| CN109595472A (en) * | 2018-11-29 | 2019-04-09 | 北京市燃气集团有限责任公司 | The pipeline abnormal flow recognition methods of mesolow garden and device based on spectrum analysis |
| CN109595472B (en) * | 2018-11-29 | 2020-07-24 | 北京市燃气集团有限责任公司 | Method and device for identifying abnormal flow of medium-low pressure yard pipeline based on spectral analysis |
| CN111351618A (en) * | 2018-12-21 | 2020-06-30 | 北京新联铁集团股份有限公司 | Air tightness detection method and system for rail transit rolling stock |
| CN110145694A (en) * | 2019-07-02 | 2019-08-20 | 北京中计新业科技发展有限公司 | A kind of gas distributing system leakage monitoring system and detection method |
| CN112923245A (en) * | 2021-02-03 | 2021-06-08 | 宁波水表(集团)股份有限公司 | Method for detecting leakage of water supply pipe network |
| CN112923245B (en) * | 2021-02-03 | 2024-02-13 | 宁波水表(集团)股份有限公司 | Method for exploring leakage of water supply network |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN101319955A (en) | Method for extracting leakage of pipe monitored by infrasonic wave | |
| Khulief et al. | Acoustic detection of leaks in water pipelines using measurements inside pipe | |
| EP2208039B1 (en) | Method and system for registering and measuring leaks and flows | |
| EP3317658B1 (en) | Turbidity sensor based on ultrasound measurements | |
| CN104747912B (en) | Fluid conveying pipe leakage acoustic emission time-frequency positioning method | |
| Pal et al. | Detecting & locating leaks in water distribution polyethylene pipes | |
| CN103154721A (en) | Apparatus and method for noninvasive particle detection using Doppler spectroscopy | |
| CN105351756A (en) | Pipeline leakage recognizing and positioning system and method based on sound wave imaging | |
| Papadopoulou et al. | An evaluation of acoustic reflectometry for leakage and blockage detection | |
| CN104764564B (en) | Valves leakage detection method based on sonic sensor | |
| CN106813108A (en) | A kind of leakage locating method based on speed difference | |
| CN112066272B (en) | Gas pipeline leakage detection device and detection method based on infrasonic waves | |
| CN105953080B (en) | Soundwave leakage localization method based on homonymy sensor arrangement | |
| Qu et al. | Study on the natural gas pipeline safety monitoring technique and the time-frequency signal analysis method | |
| KR101577733B1 (en) | Diagnosis system for checking a clogging in a pipeline using acoustic transfer matrix | |
| CN105627106B (en) | A kind of infrasound sensor of gas pipeline leak detection | |
| CN101392869A (en) | Safety alarm and leakage alarm method for pipe | |
| KR100888320B1 (en) | Iternal valve leak diagnosis apparatus and method the same | |
| Bernasconi et al. | Advanced real time and long term monitoring of transportation pipelines | |
| Khulief et al. | On the in-pipe measurements of acoustic signature of leaks in water pipelines | |
| Adnan et al. | Leak detection in MDPE gas pipeline using dual-tree complex wavelet transform | |
| Aghashahi et al. | Benchmarking dataset for leak detection and localization in water distribution systems | |
| RU46579U1 (en) | PIPELINE DAMAGE DETECTION SYSTEM | |
| CN109340587B (en) | Empirical mode decomposition-based fluid pipeline leakage acoustic emission coherent positioning method | |
| CN107035974A (en) | A kind of underground piping leakage inspector and its detection method |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| DD01 | Delivery of document by public notice |
Addressee: Sha Xiaoli Document name: Notice of examination of N notice |
|
| DD01 | Delivery of document by public notice |
Addressee: Qin Changna Document name: Notification of Passing Examination on Formalities |
|
| C12 | Rejection of a patent application after its publication | ||
| RJ01 | Rejection of invention patent application after publication |
Open date: 20081210 |